- #3939 of 4893
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Re: New Tires? [qbrozen]
by illini4
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Feb 02, 2005 (4:56 am)
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Replying to: qbrozen (Feb 01, 2005 7:22 am)
Cupping is typically caused by improper toe adjustment.
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- #3940 of 4893
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by kirstie_h HOST
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Feb 02, 2005 (11:01 am)
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A national newspaper hopes to talk with a consumer who traded in a Mercedes for a Chrysler 300C. Please respond to jfallon edmunds.com no later than Tuesday, February 8, 2005 with your daytime contact info and a few words about your decision.
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- #3941 of 4893
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Re: New Tires? [illini4]
by qbrozen
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Feb 02, 2005 (11:38 am)
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Replying to: illini4 (Feb 02, 2005 4:56 am)
maybe i'm not sure what cupping is. i thought that was the term for when the shoulders of the tires are wearing faster than the center, which is due to underinflation.
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- #3942 of 4893
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Re: New Tires? [qbrozen]
by tolenash
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Feb 02, 2005 (12:41 pm)
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Replying to: qbrozen (Feb 02, 2005 11:38 am)
http://www.partsamerica.com/MaintenanceTireProblem.asp
"Cupping can be caused by an unbalanced tire condition, faulty wheel bearings, loose parts, fatigued springs or weak shock absorbers. Check the condition of the shock by forcefully bouncing the front end of the car several times and releasing it on the down stroke. Failure of the vehicle to settle after two strokes suggests worn shocks or struts."
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- #3943 of 4893
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Re: New Tires? [tolenash]
by espo1
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Feb 02, 2005 (1:37 pm)
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Replying to: tolenash (Feb 02, 2005 12:41 pm)
I leased a BMW 530 with sports suspension. It had performance tires. BMW tuned the suspension so that the front had a camber setting that pulled the tires away from the car. So that when you cornered hard the tire on the outside as it lifted kept more tread on the ground. With wide soft tires this helped to give more traction and the car held nicely. But I noticed that the front cupped quickly. the tires lasted about 18000 and I got another set. Even when I rotated them every 3000 miles they still cupped as fast as the first set. BMW also recommend more pressure in the rears that caused them to wear in the center. So maybe DC is trying to give you better performance and is tuning the suspension a little.
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- #3944 of 4893
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Re: New Tires? [tolenash]
by qbrozen
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Feb 02, 2005 (1:42 pm)
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Replying to: tolenash (Feb 02, 2005 12:41 pm)
thanks for the link, but that still doesn't tell me what cupping IS. That link also talks about wear on the shoulders and how that is related to underinflation, as I stated. So, apparently, cupping is a different type of wear, but what type? what does it look like?
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- #3945 of 4893
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Re: New Tires? [qbrozen]
by espo1
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Feb 02, 2005 (1:48 pm)
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Replying to: qbrozen (Feb 02, 2005 1:42 pm)
As you run your hand along the outside or inside edge of the tire you will feel ridges along the tread edges sort of a concave effect thats like a cup. The tires will also start to whine as the ridges get deeper.
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- #3946 of 4893
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Re: New Tires? [espo1]
by viper01
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Feb 03, 2005 (6:00 am)
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Replying to: espo1 (Feb 02, 2005 1:48 pm)
I would describe cupping as uneven wear on the outside edges of the tire. Unlike underinflation which would cause a uniform "balding" along the edges, cupping would result in many bald spots spaced several inches apart along the edge. Bald spots would be the extreme manifestation. Earlier indications would be uneven wear of the tire pattern (cleats?) at the edge of the tire. It is an unusual condition. Main causes (probably not all) are out of balance tires or faulty shocks followed by worn suspension components.
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- #3947 of 4893
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Re: New Tires? [qbrozen]
by tolenash
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Feb 03, 2005 (7:24 am)
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Replying to: qbrozen (Feb 02, 2005 1:42 pm)
http://www.etrucker.com/apps/news/article.asp?id=22765
try this one...scroll down and find the pic and description.
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- #3948 of 4893
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Re: New Tires?
by qbrozen
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Feb 03, 2005 (7:26 am)
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Replying to: tolenash (Feb 03, 2005 7:24 am)
thanks for the info, folks.
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